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d66e34cd RM |
1 | # Makefile for elf subdirectory of GNU C Library. |
2 | ||
a641835a | 3 | # Copyright (C) 1995, 1996 Free Software Foundation, Inc. |
01cc0be6 RM |
4 | # This file is part of the GNU C Library. |
5 | ||
6 | # The GNU C Library is free software; you can redistribute it and/or | |
7 | # modify it under the terms of the GNU Library General Public License as | |
8 | # published by the Free Software Foundation; either version 2 of the | |
9 | # License, or (at your option) any later version. | |
10 | ||
11 | # The GNU C Library is distributed in the hope that it will be useful, | |
12 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | # Library General Public License for more details. | |
15 | ||
16 | # You should have received a copy of the GNU Library General Public | |
17 | # License along with the GNU C Library; see the file COPYING.LIB. If | |
18 | # not, write to the Free Software Foundation, Inc., 675 Mass Ave, | |
19 | # Cambridge, MA 02139, USA. | |
20 | ||
d66e34cd RM |
21 | subdir := elf |
22 | ||
567c63af | 23 | headers = elf.h elfclass.h link.h dlfcn.h |
ba79d61b RM |
24 | routines = init-first $(dl-routines) \ |
25 | dl-open dl-close dl-symbol dl-support | |
266180eb RM |
26 | |
27 | # The core dynamic linking functions are in libc for the static and | |
28 | # profiled libraries. | |
29 | dl-routines = $(addprefix dl-,load lookup object reloc deps \ | |
30 | runtime error init fini) | |
31 | # But they are absent from the shared libc, because that code is in ld.so. | |
32 | elide-routines.so = $(dl-routines) dl-support | |
33 | ||
34 | # ld.so uses those routines, plus some special stuff for being the program | |
35 | # interpreter and operating independent of libc. | |
36 | rtld-routines := rtld $(dl-routines) dl-sysdep dl-minimal | |
37 | distribute = $(rtld-routines:=.c) dynamic-link.h do-rel.h dl-machine.h \ | |
38 | soinit.c sofini.c ldd.sh.in linux-compat.c | |
d66e34cd | 39 | |
266180eb | 40 | extra-libs = libdl |
a2b934be | 41 | libdl-routines := dlopen dlclose dlsym dlerror dladdr |
d66e34cd | 42 | |
01cc0be6 | 43 | |
bfc04a9f RM |
44 | all: # Make this the default target; it will be defined in Rules. |
45 | ||
d66e34cd RM |
46 | include ../Makeconfig |
47 | ||
48 | ifeq (yes,$(build-shared)) | |
0324daa0 | 49 | extra-objs = $(rtld-routines:=.so) soinit.so sofini.so |
db2286f6 | 50 | generated = librtld.so dl-allobjs.so |
094bacdb | 51 | install-others = $(slibdir)/$(rtld-installed-name) |
b122c703 | 52 | install-bin = ldd |
86d2c878 | 53 | |
266180eb | 54 | # Make sure these things are built in the `make lib' pass so they can be used |
1796d83f | 55 | # to run programs during the `make others' pass. |
14d898ae | 56 | lib-noranlib: $(objpfx)ld.so $(addprefix $(objpfx),$(extra-objs)) |
1796d83f | 57 | |
ba79d61b | 58 | ifneq (,$(filter linux% linux,$(config-os))) |
86d2c878 | 59 | extra-objs += linux-compat.so |
094bacdb | 60 | install-others += $(slibdir)/ld-linux.so.1 |
14d898ae | 61 | lib-noranlib: $(objpfx)ld-linux.so.1 |
86d2c878 | 62 | endif |
d66e34cd | 63 | endif |
01cc0be6 RM |
64 | |
65 | include ../Rules | |
d66e34cd | 66 | |
86d2c878 | 67 | |
db2286f6 RM |
68 | # Command to link into a larger single relocatable object. |
69 | reloc-link = $(LINK.o) -nostdlib -nostartfiles -r -o $@ | |
70 | ||
71 | $(objpfx)dl-allobjs.so: $(rtld-routines:%=$(objpfx)%.so) | |
72 | $(reloc-link) $^ | |
73 | ||
86d2c878 RM |
74 | # Link together the dynamic linker into a single relocatable object. |
75 | # We use this to produce both the ABI-compliant and Linux-compatible | |
76 | # dynamic linker shared objects below. | |
db2286f6 | 77 | $(objpfx)librtld.so: $(objpfx)dl-allobjs.so \ |
86d2c878 | 78 | $(patsubst %,$(common-objpfx)lib%_pic.a,\ |
ba79d61b | 79 | c $(LDLIBS-c.so:-l%=%)) |
db2286f6 | 80 | $(reloc-link) '-Wl,-(' $^ -lgcc '-Wl,-)' |
d66e34cd | 81 | |
e3845371 RM |
82 | $(objpfx)ld.so: $(objpfx)librtld.so |
83 | $(rtld-link) -Wl,-soname=$(rtld-installed-name) | |
84 | $(objpfx)ld-linux.so.1: $(objpfx)librtld.so | |
85 | $(rtld-link) -Wl,-soname=ld-linux.so.1 | |
86 | ||
87 | define rtld-link | |
88 | $(LINK.o) -nostdlib -nostartfiles -shared -o $@ \ | |
89 | -Wl,-rpath=$(default-rpath) $^ | |
90 | endef | |
86d2c878 | 91 | |
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92 | # The dl code in the static libc needs a default library path. |
93 | CFLAGS-dl-support.c = -D'DEFAULT_RPATH="$(default-rpath)"' | |
94 | ||
86d2c878 RM |
95 | # The Linux-compatible dynamic linker shared object is just the same |
96 | # with one object file of compatibility initialization code added. | |
97 | $(objpfx)ld-linux.so.1: $(objpfx)linux-compat.so | |
98 | ||
99 | ||
266180eb RM |
100 | # Specify the dependencies of libdl.so; its commands come from the generic |
101 | # rule to build a shared library. | |
7e0e6f50 | 102 | $(objpfx)libdl.so: $(objpfx)libdl_pic.a $(common-objpfx)libc.so $(objpfx)ld.so |
b122c703 | 103 | |
094bacdb RM |
104 | $(slibdir)/$(rtld-installed-name): $(objpfx)ld.so; $(do-install-program) |
105 | $(slibdir)/ld-linux.so.1: $(objpfx)ld-linux.so.1; $(do-install-program) | |
b122c703 | 106 | |
f8adc70c RM |
107 | $(objpfx)ldd: ldd.sh.in Makefile |
108 | sed 's%@RTLD@%$(slibdir)/$(rtld-installed-name)%g' < $< > $@.new | |
094bacdb | 109 | chmod 555 $@.new |
b122c703 | 110 | mv -f $@.new $@ |